Optical beam leveling instrument



FIG. 1 is a left side elevational view of an optical beam leveling instrument, showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a top perspective view thereof; and,

FIG. 8 is a bottom perspective view thereof. 

The ornamental design for an optical beam leveling instrument, as shown and described. 